//
// Created by jsjxsy on 2022/7/21.
//

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

#define NLOOP 5000

int counter;                /* incremented by threads */

void *doit(void *);

int main(int argc, char **argv) {
  pthread_t tidA, tidB;

  pthread_create(&tidA, NULL, &doit, NULL);
  pthread_create(&tidB, NULL, &doit, NULL);

  /* wait for both threads to terminate */
  pthread_join(tidA, NULL);
  pthread_join(tidB, NULL);

  return 0;
}

void *doit(void *vptr) {
  int i, val;

  /*
   * Each thread fetches, prints, and increments the counter NLOOP times.
   * The value of the counter should increase monotonically.
   */

  for (i = 0; i < NLOOP; i++) {
    val = counter;
    printf("%#x: %d\n", (unsigned int) pthread_self(), val + 1);
    counter = val + 1;
  }

  return NULL;
}